diff --git a/stm-firmware/include/stm-periph/backup-ram.h b/stm-firmware/include/stm-periph/backup-ram.h
index a2d2292..3f4a470 100644
--- a/stm-firmware/include/stm-periph/backup-ram.h
+++ b/stm-firmware/include/stm-periph/backup-ram.h
@@ -19,11 +19,13 @@
  */
 
 #include <stdint.h>
+#include <stdbool.h>
 
 /**
  * @brief Init the backup ram and make it accesible
+ * @param use_backup_regulator Enable the Backup VBAT regulator. It will be used, when VDD is powered off
  */
-void backup_ram_init(void);
+void backup_ram_init(bool use_backup_regulator);
 
 /**
  * @brief Disable access to the backup RAM. This saves power
diff --git a/stm-firmware/stm-periph/backup-ram.c b/stm-firmware/stm-periph/backup-ram.c
index d2bca10..62ad992 100644
--- a/stm-firmware/stm-periph/backup-ram.c
+++ b/stm-firmware/stm-periph/backup-ram.c
@@ -34,18 +34,20 @@
 #error "Backup RAM size ahs to be a power of two!"
 #endif
 
-void backup_ram_init(void)
+void backup_ram_init(bool use_backup_regulator)
 {
 	rcc_manager_enable_clock(&RCC->APB1ENR, BITMASK_TO_BITNO(RCC_APB1ENR_PWREN));
 
 	/* Enable access to backup RAM register set */
 	PWR->CR |= PWR_CR_DBP;
 
-	/* Enable the backup regulator */
-	PWR->CSR |= PWR_CSR_BRE;
+	if (use_backup_regulator) {
+		/* Enable the backup regulator */
+		PWR->CSR |= PWR_CSR_BRE;
 
-	/* Wait until regulator is ready */
-	while (!(PWR->CSR & PWR_CSR_BRR));
+		/* Wait until regulator is ready */
+		while (!(PWR->CSR & PWR_CSR_BRR));
+	}
 
 	/* Enable clock for backup ram interface */
 	rcc_manager_enable_clock(&RCC->AHB1ENR, BITMASK_TO_BITNO(RCC_AHB1ENR_BKPSRAMEN));